Answer: 47
Notes: There are 16 National Highways connecting West Bengal with the rest of the India. They are: NH2, NH6, NH10, NH12, NH14, NH16, NH17, NH18, NH19, NH27, NH31, NH31A, NH31C, NH32, NH33, NH34, NH35, NH41, NH49, NH55, NH60, NH60A, NH80, NH81, NH112, NH114, NH114A, NH116, NH11B, NH116B, NH117, NH131A, NH133A, NH218, NH312, NH316, NH316A, NH317, NH317A, NH327, NH327B, NH327C, NH419, NH512, NH517, NH717, and NH717A.
